Add unit tests for lib/in46_addr.c code

Change-Id: Id032c330405e5dca8ecfc0970d128341ed75c675
diff --git a/tests/testsuite.at b/tests/testsuite.at
index a10152f..cc0c949 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -7,3 +7,9 @@
 cat $abs_srcdir/lib/ippool_test.err > experr
 AT_CHECK([$abs_top_builddir/tests/lib/ippool_test], [], [expout], [experr])
 AT_CLEANUP
+
+AT_SETUP([in46a])
+AT_KEYWORDS([in46a])
+cat $abs_srcdir/lib/in46a_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/lib/in46a_test], [], [expout], [])
+AT_CLEANUP